UK Honours for Commonwealth Citizens
With the permission of the relevant government, the UK Government can recommend Commonwealth citizens for UK honours. The recipient will usually receive their honour in their home country by their Governor-General (The King's representative in that country). However, they can also request to attend an Investiture ceremony at Buckingham Palace.
The King is also Sovereign of the honours systems of certain Commonwealth countries, for example the Orders of Canada, Australia and New Zealand. You can find out more about these orders through the links below:
Commonwealth Honours for UK Citizens
Occasionally, a Commonwealth Government nominates a UK citizen to receive one of their own honours, with permission from The King. These British citizens are usually allowed to wear the honour's insignia and use the relevant postnominal letters. However, they would not be permitted to use any associated titles, as the UK Government regards these awards as honorary.